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Other Income (Loss), Net (Tables)
 12 Months Ended
Dec. 31, 2018
Other Income and Expenses [Abstract]  
Schedule of Other Income (Loss), Net
(In thousands)
2018
 
2017
 
2016
Interest income
$
4,588

 
$
3,596

 
$
2,827

Components of net periodic benefit cost other than service cost (Note 14)
4,641

 
3,768

 
3,490

Gain (Loss) on asset dispositions, net
646

 
(557
)
 
593

Other, net
(644
)
 
(1,249
)
 
710

Total other income, net
$
9,231

 
$
5,558

 
$
7,620